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Two batteries of emf and internal resistance e1,2 and r1,2 are connected in parallel. Find the effective emf and internal resistance of this parallel combination.
What minimum constant acceleration does this need if the aircraft is to be airborne after a takeoff run of 250 m.
A solenoid is constructed with a total of 1500 turns wound around a length of 25 cm. A constant current of 1.7 A flows through the solenoid. Calculate the magnetic force on the proton
A pipe open only at one end has a fundamental frequency of 282Hz. A second pipe, initially identical to first pipe, is shortened by cutting off a portion of the open end.
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state
You can ignore friction between the sled and surface of the pond. Use the work-energy theorem to find the speed of the sled at 3.00 m.
A 16.0-? resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 170-V generator. What is the maximum value of the rms current?
What is the size of the static friction force on the cabinet when the bed is tilted at 20o? At what angle will the file cabinet begin to slide if the coefficient of static friction of steel on steel is Ms= 0.80 and the coefficient of kinetic frict..
An archer shoots an arrow with a velocity of47.5m/s at an angle of50.5° with the horizontal. What is the initial speed of the apple
A styrofoam box used to keep drinks cold at picnic has total wall area(including the lid) of 0.80m2 and wall thickness 2 cm. it is filled with ice, water and cans at 0 Celsius. What is the rate of heat flow into the box if temperature of the outsi..
A curve in a highway has radius of curvature 120 m and is banked at 2.8°. what is the safest speed to go around the curve
Two converging lenses, each of focal length 13.1 cm, are placed 58.6 cm apart, and an object is placed 29.9 cm in front of the first. What is the magnification of the system
A visual binary system is at a distance of 5.0 pc. The distance between the two stars subtends an angle of 4.5 arcseconds. What is the mass of each of the stars
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